Image analysis – Image compression or coding – Shape – icon – or feature-based compression
Patent
1997-10-01
1999-11-02
Au, Amelia
Image analysis
Image compression or coding
Shape, icon, or feature-based compression
382239, 382242, 382250, 382253, 348398, 348404, 348418, G06K 936, G06K 946
Patent
active
059785144
ABSTRACT:
An image data coding system comprises a screen-area determining means for determining the area of a screen reproduced on the basis of an input image data; a code-amount assigning control means for controlling regions to which data on the screen are to be assigned and the code amount assigned to each of the regions, on the basis of the results determined on the area of the reproduced screen; and a coding means for coding the image data signal inputted in accordance with the code amount assigned to each of the regions. In an image data coding and/or decoding system, a coding system performs the two-dimensional orthogonal transform of picture signals of all the pixels with respect to inside blocks and of only picture signals of pixels contained in a content with respect to edge blocks, in accordance with a map signal indicative of the position and shape of the content, and it codes the map signal. A decoding system selects an orthogonal transform coefficient necessary to reproduce an image of a desired resolution from coded orthogonal coefficients on the basis of a coded and resolution-transformed map signal. It performs the two-dimensional inverse orthogonal transform of all the coefficients with respect to the inside blocks and of only the coefficients contained in the content with respect to the edge blocks thereby deriving a resolution-transformed regenerative signal.
REFERENCES:
patent: 4698689 (1987-10-01), Tzou
patent: 5144688 (1992-09-01), Bovir et al.
patent: 5150432 (1992-09-01), Ueno et al.
patent: 5225904 (1993-07-01), Golin et al.
patent: 5267333 (1993-11-01), Aono et al.
patent: 5309232 (1994-05-01), Hartung et al.
patent: 5321750 (1994-06-01), Nadan
patent: 5361147 (1994-11-01), Katayama et al.
patent: 5408270 (1995-04-01), Lim
patent: 5422963 (1995-06-01), Chen et al.
patent: 5553160 (1996-09-01), Dawson
patent: 5592302 (1997-01-01), Hirabayashi
patent: 5608458 (1997-03-01), Chen et al.
Peter L. Silsbee, et al., "Visual Pattern Image Sequencing Coding," IEEE Transactions on Circuits and Systems for Video Technology, vol. 3, No. 4, Aug. 1993, pp. 291-301.
Chujoh Takeshi
Dachiku Kenshi
Ida Takashi
Kikuchi Yoshihiro
Watanabe Toshiaki
Au Amelia
Johnson Timothy M.
Kabushiki Kaisha Toshiba
LandOfFree
Image data coding and decoding system for efficiently compressin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image data coding and decoding system for efficiently compressin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image data coding and decoding system for efficiently compressin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2146751